Casing chains are not contraband. Shell hanging chain refers to the decorative chain or pendant used to carry shell casings, which is not contraband in itself. However, the bullet chain can also be mistaken for a tool or weapon accessory for carrying ammunition, so it will be prohibited to carry or use in some cases. Specifically, according to the laws, regulations and safety regulations of different countries or regions, casing chains are restricted and prohibited. In some public places or activities, such as airports, railway stations, schools, performance venues, etc. It is forbidden or restricted to carry shell casings on the chain to ensure public safety and order. Therefore, when carrying shell casings to hang chains, we must first understand local laws, regulations and safety regulations to avoid unnecessary troubles caused by violating relevant regulations. Hanging chain is a kind of chain decoration item, which is usually composed of multiple metal links or other materials. It is used to match various clothes or as a decoration for pendants, key chains and other items. There are various styles and designs of chain hangers, which can be selected according to different needs and occasions. The materials of catenary are metal, leather, rope, jewelry, etc., among which metal products are the most common. The length of the hanging chain is not fixed and can be selected according to personal preferences and needs. In fashion collocation, the use of hanging chains to create personalized and fashionable shapes, showing personal taste and style.